Siemens Automation System S7-400 - Manual (Page 9)

Contents
ix
Automation System S7-400 Hardware and Installation
A5E00850741-01
7 Maintenance 7-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 Replacing the Backup Battery 7-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Replacing a Power Supply Module 7-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3 Replacing CPUs 7-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.4 Replacing Digital or Analog Modules 7-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.5 Changing the Fuses in the Digital Modules 7-9 . . . . . . . . . . . . . . . . . . . . . . . . . .
7.6 Replacing Interface Modules 7-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.7 Replacing the Fuse of the Fan Subassembly 7-13 . . . . . . . . . . . . . . . . . . . . . . . .
7.8 Replacing Fans in the Fan Subassembly During Operation 7-14 . . . . . . . . . . . .
7.9 Replacing the Filter Frame of the Fan Subassembly During Operation 7-16 . .
7.10 Replacing the Power Supply PCB and Monitoring PCB
of the Fan Subassembly 7-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.11 Replacing Interface Submodules 7-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Assembling and Installing Systems A-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.1 General Rules and Regulations for Operating the S7-400 A-2 . . . . . . . . . . . . .
A.2 Principles of System Installation for EMC A-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.3 Installation of Programmable Controllers for EMC A-9 . . . . . . . . . . . . . . . . . . . .
A.4 Examples of EMC-Compatible Assembly A-10 . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.5 Shielding Cables A-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.6 Equipotential Bonding A-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.7 Cabling Inside Buildings A-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.8 Cabling Outside Buildings A-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.9 Lightning Protection and Overvoltage Protection A-20 . . . . . . . . . . . . . . . . . . . . .
A.9.1 Lightning Protection Zone Concept A-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.9.2 Rules for the Transition between Lightning Protection Zones 0 and 1 A-23 . . .
A.9.3 Rules for the Transitions between Lightning Protection Zones 1 <-> 2
and Greater A-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.9.4 Sample of a Surge Protection Circuit for Networked S7-400 PLCs A-28 . . . . .
A.10 How to Protect Digital Output Modules against Inductive Surge A-30 . . . . . . . .
A.11 Safety of Electronic Control Equipment A-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.12 Interference-Free Connection of Monitors A-34 . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Guidelines for Handling Electrostatically-Sensitive Devices (ESD) B-1 . . . . . . . . . .
B.1 What is ESD? B-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.2 Electrostatic Charging of Persons B-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.3 General Protective Measures Against Electrostatic Discharge Damage B-4 .
Glossary
Index